12016325161 has 3 divisors (see below), whose sum is σ = 12016434781. Its totient is φ = 12016215542.

The previous prime is 12016325159. The next prime is 12016325221. The reversal of 12016325161 is 16152361021.

The square root of 12016325161 is 109619.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16152361021 = 4021 ⋅4017001.

It is not a de Polignac number, because 12016325161 - 2¹ = 12016325159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12016325261) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 54810 + ... + 164428.

Almost surely, 2^12016325161 is an apocalyptic number.

12016325161 is the 109619-th square number.

12016325161 is the 54810-th centered octagonal number.

It is an amenable number.

12016325161 is a deficient number, since it is larger than the sum of its proper divisors (109620).

12016325161 is an frugal number, since it uses more digits than its factorization.

12016325161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219238 (or 109619 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 12016325161 its reverse (16152361021), we get a palindrome (28168686182).

The spelling of 12016325161 in words is "twelve billion, sixteen million, three hundred twenty-five thousand, one hundred sixty-one".